Re: [Xen-devel] suspend evetchn creation failure

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Mon, 2014-03-03 at 12:24 -0500, Prateek Sharma wrote:
> Hi all,
>       During xm save, I xc_save throws up this error :
> "failed to get the suspend evtchn port".
>       From my understanding, the port is supposed to be stored by 
> xenstore in /local/domain/, but I can't see the port being created using 
> xenstore-ls either.

I think this event channel is created by the guest and written to
xenstore as part of support for the fast event channel based save
mechanism used by e.g. remus. In its absence save/suspend is triggered
via the traditional method of the toolstack writing commands to the
"control/shutdown" node.

IIRC the fast event channel based save stuff is not in mainline kernels,
so the tools message is correct but harmless.

CCing Shriram (Remus maintainer) in case I've got all the above wrong...

Ian.

>       So, when is the port created during the domain's creation? And 
> what factors could contribute to inexistence of the port? Are there any 
> compilation/config options? I have disabled stumdom compilation.
> 
> Thanks!
> --Prateek
> 
> 
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